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Permissive tracts are areas where geology permits certain types of mineral deposits to exist. Each deposit type has a layer that consists of several separate geographic areas. Each permissive tract contains information on the number of possibly existing mineral deposits and their metal contents in metric tons, estimated at several levels of probability.
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In regard to product series, such as Detailed aerogeophysical survey, or Aerogeophysical low altitude maps at 1:20 000 scale, the intended areas or map sheets must first be selected with the "Area selection" tool in the map window and then be transferred with the "Download" or "Buy" button to the Shopping Cart or with "Order" buttom to the Order request form.